How do you get Piece of Kassapa's Robe with the console?

effect create_artifact_robe_kassapa_effect = { OWNER = root } — runs the scripted effect that makes it, for the character you play (debug mode).

What if the owner can't benefit from Piece of Kassapa's Robe?

They get Court grandeur baseline +3 instead.

Court artifact · Pedestal Item

Piece of Kassapa's Robe

IllustriousUniqueHoly relicThe Royal Court

Piece of Kassapa's Robe is an illustrious pedestal item artifact in Crusader Kings III: Court grandeur baseline +2, Piety +0.3/month, Monthly Piety +10%, Temple Buildings Construction Cost -20%, Temple Holding Construction Cost -20%. Quality 100 and wealth 100; maximum durability 150, and it does not wear out. At game start it goes to the holder of Pagan — needs The Royal Court. It needs The Royal Court. Patch 1.20.0.3, from game/common/scripted_effects/01_exp1_historical_artifacts_creation_effect.txt.

Quick answers (3)

What does Piece of Kassapa's Robe do in CK3?: Court grandeur baseline +2, Piety +0.3/month, Monthly Piety +10%, Temple Buildings Construction Cost -20%, Temple Holding Construction Cost -20% (patch 1.20.0.3).
How do you get Piece of Kassapa's Robe with the console?: effect create_artifact_robe_kassapa_effect = { OWNER = root } — runs the scripted effect that makes it, for the character you play (debug mode).
What if the owner can't benefit from Piece of Kassapa's Robe?: They get Court grandeur baseline +3 instead.

Kassapa, the third Buddha of the present Kalpa, wore this robe for much of his day-to-day life. A curiously coarse piece of fabric, it holds a special place of reverence as one of the only known items of a Buddha's clothing that survives.

Effects

For an owner who can't benefit from it

The template gives these instead of the effects above when its “can benefit” check fails:

Court grandeur baseline+3

Who can benefit (can_benefit) (1 line of game script)

has_religion = religion:buddhism_religion

As written in game/common/artifacts/templates (buddhism_artifact_template).

Counts as a holy relic for (is_holy_relic) (6 lines of game script)

OR = {
	religion = religion:buddhism_religion
	main_rite = {
		rite_has_parameter = eastern_syncretic_actor
	}
}

As written in game/common/artifacts/templates (buddhism_artifact_template).

History and who has it

Made before recorded history.
At game start: the holder of Pagan — needs The Royal Court.

How it is made

The game creates it with the scripted effect create_artifact_robe_kassapa_effect. In the console (how to open it), this gives it to the character you play:

effect create_artifact_robe_kassapa_effect = { OWNER = root }

Built from the effect's file; not run in the game by us.

Source: game/common/scripted_effects/01_exp1_historical_artifacts_creation_effect.txt, common/modifiers (kassapa_modifier), common/artifacts/templates (buddhism_artifact_template) and the English localisation, Crusader Kings III 1.20.0.3.